'''
使用单链表实现的学生管理系统
'''
import pickle
import abc
import configparser

class Student(abc.ABC):
    '''
    抽象学生类
    '''
    @abc.abstractmethod
    def add(self):
        '''
        增加学生结点
        '''
        pass

    @abc.abstractmethod
    def ladd(self):
        '''
        从左侧增加学生结点
        '''
        pass

    @abc.abstractmethod
    def delete(self,id_):
        '''
        根据id值来删除一个结点
        '''
        pass

    @abc.abstractmethod
    def delete_name(self,name):
        '''
        根据姓名来删除一个结点
        '''
        pass

    @abc.abstractmethod
    def insert(self,idx,val):
        '''
        插入到指定的位置
        '''
        pass

    @abc.abstractmethod
    def show(self):
        '''
        显示所有的学生结点
        '''
        pass

    @abc.abstractmethod
    def search_id(self):
        '''
        根据id查询节点
        '''
        pass

    @abc.abstractmethod
    def search_name(self):
        '''
        根据name查询节点
        '''

    @abc.abstractmethod
    def modity_id(self):
        '''
        根据id找到节点，然后修改
        '''
        pass



class Node(object):
    '''
    学生链表结点
    '''
    def __init__(self,id_: int,name: str,sex: str,age: int,score: int):
        self.id = id_
        self.name = name
        self.sex = sex
        self.age = age
        self.score = score

        self.next = None

    def modity(self,id_,name,sex,age,score):
        '''
        修改
        '''
        self.id = id_
        self.name = name
        self.sex = sex
        self.age = age
        self.score = score


    def __str__(self):
        '''
        用于显示输出
        '''
        return f"[学生:{self.id:^2}]-->name:{self.name:^10}sex:{self.sex:^10}age:{self.age:^10}score:{self.score:^10}"

class Student_LinkList(Student):
    '''
    学生链表
    '''
    def __init__(self):
        self.head = Node(-1,'head','-1',-1,-1)
        self.length = 0
        self.tail = self.head  #尾部结点用于尾插

    def add(self,id_,name,sex,age,score):
        '''
        添加一个学生结点,尾插
        '''
        #print('当前tail的值',self.tail)
        temp = Node(id_,name,sex,age,score)
        self.tail.next = temp 
        self.tail = self.tail.next

        self.length += 1
        print('[info]:添加成功')

    def ladd(self,id_,name,sex,age,score):
        '''
        添加一个学生，头插
        '''
        temp = Node(id_,name,sex,age,score)
        temp.next = self.head.next
        self.head.next = temp

        if self.tail == self.head:
            self.tail = temp

        self.length += 1
        print('[info]:添加成功')

    def delete(self,id_):
        '''
        根据id值来删除一个结点,用迭代实现
        '''
        p = self.head
        while p.next != None and p.next.id != id_:
            p = p.next

        if p.next == None:
            print('[error]:找不到id')
            return -1
        else:
            temp = p.next
            p.next = temp.next
            #如果删除的是尾结点，还要移动tail
            if temp.next == None:
                self.tail = p
            del temp
        print('[info]:删除成功')

    def delete_name(self,name):
        '''
        根据姓名来删除一个结点，用递归实现
        '''
        def _func(node: Node,name: str):
            '''
            递归函数
            '''
            #到了尾巴节点了，还没有找到
            if node.next == None:
                print('[info]:找不到name')
                return False
            elif node.next.name == name:
                temp = node.next
                node.next = temp.next
                #如果删除的是尾结点，还要移动tail
                if temp.next == None:
                    self.tail = node
                del temp
                print('[info]:删除成功')
                return True
            else:
                return _func(node.next,name)

        t = self.head
        return _func(t,name)

    def insert(self,idx,id_,name,sex,age,score):
        '''
        在指定位置插入数据
        '''
        if idx > self.length or idx == 0:
            print(f'[error]:你输入的索引非法(1-{self.length})')
            return 0
        p,cur = self.head,0
        while p != None and cur < idx-1:
            p = p.next

        if cur < idx-1:
            return -1
        else:
            temp = Node(id_,name,sex,age,score)
            temp.next = p.next
            p.next = temp
            return True
        print('[info]:插入成功')

    def search_id(self,id_):
        '''
        根据id查询节点
        '''
        p = self.head
        while p != None and p.id != id_:
            p = p.next
        if p == None:
            return -1
        else:
            return p

    def search_name(self,name):
        '''
        根据name查询节点
        '''
        p = self.head
        
        def _func(node: Node,name: str):
            '''
            递归函数
            '''
            if  node == None:
                return -1
            elif node.name == name:
                return node
            return _func(node.next,name)

        return _func(p,name)

    def modity_id(self,id0,id_,name,sex,age,score):
        '''
        根据id找到节点，然后修改
        '''
        node = self.search_id(id0)
        if node == -1:
            print('[error]:找不到该id')
            return -1
        else:
            node.modity(id_,name,sex,age,score)


    def show(self):
        '''
        显示所有的学生结点,迭代
        '''
        print(f'\n{"-"*25}以下是系统内数据{"-"*25}')
        temp = []
        p = self.head
        while p != None:
            temp.append(p)
            p = p.next
        return temp

class Student_Array():
    '''
    用数组实现学生数据存储
    '''
    pass

class Student_Queue():
    '''
    用队列实现
    '''
    pass

class Student_Dict():
    '''
    用队列实现
    '''
    pass

class Persistence(abc.ABC):
    '''
    链表数据的持久化
    '''
    @abc.abstractmethod
    def save(self):
        '''
        把对象保存
        '''
        pass

    @abc.abstractmethod
    def load(self):
        '''
        加载对象
        '''
        pass

class Persistence_Pickle(Persistence):
    '''
    使用pickle来序列化
    '''
    def __init__(self,cls: Student,file_):
        self.filename = file_
        self.obj = None
        self.cls = cls

    def save(self):
        with open(self.filename,'wb') as f:
            pickle.dump(self.obj,f)

    def load(self):
        try:
            with open(self.filename,'rb') as f:
                temp = pickle.load(f)
        except:
            temp = globals()[self.cls]()
        print('返回temp:',type(temp))
        self.obj = temp
        return temp

class Persistence_File(Persistence):
    '''
    使用文件来持久化
    '''
    pass

class Persistence_Mysql(Persistence):
    '''
    使用Mysql数据库来持久化
    '''
    pass

class Persistence_Socket(Persistence):
    '''
    使用远程套接字持久化
    '''
    pass

class MyConfigure(object):
    '''
    用来读取配置文件的类
    '''
    def __init__(self):
        self.config = configparser.ConfigParser()

    def save(self):
        '''
        保存配置文件
        '''
        with open('Student.ini','w') as f:
            self.config.write(f)

    def load(self):
        '''
        加载配置文件
        '''
        self.config.read('Student.ini')

    def get_student_class(self):
        '''
        获得Student该使用哪个子类
        '''
        return self.config['Student']['student']

    def get_persistence_class(self):
        '''
        获得持久化，该使用那个类，
        如果是Pickle或文件，还有file作为保存的文件名
        '''
        temp = {}
        temp['persistence'] = self.config['Persistence']['persistence']
        if 'Persistence_Pickle' in temp['persistence']:
            temp['file'] = self.config['Persistence']['file']
        return temp

class UI(object):
    '''
    界面交互
    '''
    def __init__(self):
        self.config = MyConfigure()
        self.config.load()
        s_class = self.config.get_student_class()
        p_class = self.config.get_persistence_class()

        self.persistence = globals()[p_class['persistence']](s_class,p_class['file'])
        self.student = self.persistence.load()
        print('实例化成功:',self.student,self.persistence)

    def save(self):
        '''
        把数据保存
        '''
        self.persistence.save()

    def quit(self):
        '''
        退出:先保存配置，然后退出
        '''
        self.config.save()
        self.save()

    def _show(self):
        '''
        显示所有学生节点
        '''
        return self.student.show()


    def _add(self,direction,*temp):
        '''
        增加学生结点,
        direction 1左添加，2右添加
        '''
        if direction == 1:
            self.student.ladd(*temp)
        elif direction == 2:
            self.student.add(*temp)

    def _delete(self,attribute: int,val: str):
        '''
        删除学生节点
        attribute: 需要根据哪个属性删除，1.id 或 2.name
        '''
        if attribute == 1:
            self.student.delete(val)
        elif attribute == 2:
            self.student.delete_name(val)

    def _insert(self,idx,*temp):
        '''
        把学生节点插入到指定的位置
        '''
        self.student.insert(idx,*temp)

    def _search(self,attribute,val):
        '''
        查询
        '''
        if attribute == 1:
            return self.student.search_id(val)
        elif attribute == 2:
            return self.student.search_name(val)

    def _modity(self,attribute,id_,*temp):
        '''
        修改
        '''
        if attribute == 1:
            self.student.modity_id(id_,*temp)
        elif attribute == 2:
            print('[info]:因为没实现，所以什么也不做')
            pass  #根据name修改没有写




class Cmd_UI(UI):
    '''
    命令行的交互界面
    '''
    def __init__(self):
        super(Cmd_UI,self).__init__()

    def get_input_1_2(self,info: str):
        '''
        获得输入，返回1或者2
        info: 描述输入的信息
        '''
        x = None
        while x == None:
            temp = input(info)
            if temp == '1':
                x = 1
            elif temp == '2':
                x = 2
            else:
                print('你只能输入1或者2')
        return x

    def get_input_arg(self):
        '''
        获得用户的输入构造学生节点
        '''
        id_ = input('请输入id')
        name = input('请输入姓名')
        sex = input('请输入性别')
        age = input('请输入年龄')
        score = input('请输入成绩')
        return (id_,name,sex,age,score)

    def delete(self):
        '''
        删除节点
        '''
        info  = '你想要根据哪个属性删除节点:1.id 2.name'
        attribute = self.get_input_1_2(info)
        val = input('输入你想要删除的值:')
        self._delete(attribute,val)

    def show(self):
        '''
        显示
        '''
        rel = self._show()
        for i in rel:
            print(i)

    def add(self):
        '''
        增加学生结点
        '''
        info = '你想要插入的位置:1.左边  2.右边'
        direction = self.get_input_1_2(info)
        arg = self.get_input_arg()
        self._add(direction,*arg)

    def insert(self):
        '''
        新学生，插入到指定的位置
        '''
        idx = int(input('输入要插入的位置'))
        temp = self.get_input_arg()
        self._insert(idx,*temp)

    def search(self):
        '''
        查询学生
        '''
        info  = '你想要根据哪个属性搜索节点:1.id 2.name'
        attribute = self.get_input_1_2(info)
        val = input('输入你想要查询的值:')

        print(self._search(attribute,val))

    def modity(self):
        '''
        修改学生信息
        '''
        info  = '你想要根据哪个属性搜索节点:1.id 2.name'
        attribute = self.get_input_1_2(info)
        val_ = input('输入要查询的值:')
        temp = self.get_input_arg()
        self._modity(attribute,val_,*temp)

    def main(self):
        '''
        主流程
        '''
        info = '''
        *******************
        *kalpa学生管理系统*
        *   0.显示数据    *
        *   1.增加数据    *
        *   2.删除数据    *
        *   3.查询数据    *
        *   4.修改数据    *
        *   5.保存并退出  *
        *******************
        '''
        print(info)
        a = '0'
        while a in ['0','1','2','3','4','5']:
            if a == '0':
                self.show()
            elif a == '1':
                self.add()
            elif a == '2':
                self.delete()
            elif a == '3':
                self.search()
            elif a == '4':
                self.modity()
            elif a == '5':
                self.quit()
                return
            a = input('>>')


if __name__ == "__main__":
    ui = Cmd_UI()
    ui.main()
